(1+sin2x-cos2x)/1+sin2x+cos2x(sin^2x+COS^2x+2sinxcosx+sin^2x-cos^2x)/(sin^2x+COS^2x+2sinxcosx+cos^2x-sin^2x)我已经化到这一步了接下来怎么办

分类: 作业答案 • 2021-12-20 01:19:38

问题描述：

(1+sin2x-cos2x)/1+sin2x+cos2x
(sin^2x+COS^2x+2sinxcosx+sin^2x-cos^2x)/(sin^2x+COS^2x+2sinxcosx+cos^2x-sin^2x)
我已经化到这一步了接下来怎么办

答

1+2sinxcosx-（1-2（sinx）^2)/1+2sinxcosx+(2(cosx)^2-1)
=2sinxcosx+2(sinx)^2/2sinxcosx+2(cosx)^2
=tans